pokemon.trade/app/controllers/api/graphql_controller.rb

# frozen_string_literal: true

class API::GraphqlController < API::ApplicationController
  include UserAuthentication

  def execute
    render json: PokemonTradeSchema.execute(
      params[:query],
      execute_params(params),
    )
  rescue StandardError => e
    raise e unless Rails.env.development?

    handle_error_in_development(e)
  end

  private

  def execute_params(hash)
    {
      operation_name: hash[:operationName],
      variables: ensure_hash(hash[:variables]),
      context: {controller: self, current_user: current_user},
    }
  end

  # Handle form data, JSON body, or a blank value
  def ensure_hash(ambiguous_param)
    case ambiguous_param
    when String
      if ambiguous_param.present?
        ensure_hash(JSON.parse(ambiguous_param))
      else
        {}
      end
    when Hash, ActionController::Parameters
      ambiguous_param
    when nil
      {}
    else
      raise ArgumentError, "Unexpected parameter: #{ambiguous_param}"
    end
  end

  def handle_error_in_development(err)
    logger.error err.message
    logger.error err.backtrace.join("\n")

    render json: {
      errors: [{message: err.message, backtrace: err.backtrace}],
      data: {},
    }, status: :internal_server_error
  end
end